Vaisala FS11 - Miscellaneous Problems

USER'S GUIDE ____________________________________________________________________
164 __________________________________________________________________ M211187EN-C
Miscellaneous Problems
Table 33 Miscellaneous Problems
Problem
Probable Cause
Remedy
Data message is
missing
Dialog not operating.
Check cable connections, make reset.
Wrong communication
parameters.
Check the communication parameters
(default in RS-232/RS-485: 9600/8N1) and
the flow control parameters.
Check the cable connections.
To prevent collisions in half-duplex RS-485
bus, switch line feeds off from your terminal
software.
If a modem is used, verify that the same
modem standard is used in both modems
and one is in the answer mode and the other
in the originate mode.
Wrong polling command used.
In the FD12 and MITRAS emulation modes,
the FS11 answers only to FD12 or MITRAS
polls, respectively.
Wrong data port.
Open the terminal program and the
command mode through the data or
maintenance line and give the PARAMETER
command. Check that the message port is
DATA and that the data port mode is the
desired one.
Sensor is off or out of power.
Check that the power switch is on and the
LEDs on the FSP103 power board are lit and
the status LED on the interface unit is
blinking. If the AC (mains) switch is on but
no LED is lit, check the fuses on the FSP103
board and verify the presence of a line
voltage.
Dots instead of data
message when
using Windows
HyperTerminal
Wrong font being used.
Select View and Font from the drop-down
menu, and click OK.
Command mode
does not open from
the service
connector
Wrong serial port on the host
computer.
Check the serial port your terminal software
is using.
Service line cabling is faulty.
Try to open the command mode from the
data port (connect your computer into the
data port using the connectors on the
FSC202 front panel) to make sure FSC202
is OK.
Visibility value
missing in the
message
Active alarm (measurement
value not reliable and not
shown).
Check which alarm is active and remove the
cause for the alarm.
Data messages
arrive but command
mode does not open
with the OPEN
command.
Unit ID is set.
Use correct ID or the format OPEN * (or
OPEN FS) that opens the command line
regardless of the unit ID. Remove the unit ID
if not needed.
Wrong communication
parameters.
Check the communication parameters
(default in RS-232/RS-485: 9600/8N1) and
the flow control parameters.